Carriage-return mechanism for type-writers.



No. 782,112. PATENTED EEB. 7, 1905. L. DGEDERLEIN.

CARRIAGE RETURN MEGHANISM VPOR TYPE WRITERS.

APPLICATION FILED JULY 11. 190s.

a SHEETS-SHEET 1.

[NVENTOR No. 782,112 PATENTEII IEB.y 7, 1905. L. DOBDBRLBIN.

CARRIAGE RETURN MBCHANISM POR TYPE WRITERS.

APPLICATION FILED JULY 11, 190s.

3 SHEETS-SHEET 2.

WITNESSES INVENTOR I PATEN'IED FEB. '7, 1905.

L. DOEDERLEIN. CARRIAGE RETURN MECHANISM FOR TYPE WRITERS.

APPLICATION FILED JULY 11. 1903.

3 SHEETS-SHEET 3.

'I INVENTOR WITNESSES IINTTED STATES LUIVIG DOEDIGRLEIN, OF CINCINNATI, OHIO, ASSIGNOR, BY IHRICOT ANI) MESSE ASSIGNMENTS, TO TYPEWIRITICR IMPROVICUEN'I COMPANY, OF

.Patented February 7, 1905.

PATENT OFFICE.

STAL'NTON, VIRGINIA, A COPARTNERSIIIl).

CARRIAGE-RETURN MECHANISIVI FOR TYPE-WRITERS.

SPECIFICATION forming part of Letters Patent No. 782,112, dated February 7, 1905.

Application filed July ll,

Be it known that I, LUowIc DoEDnnLnIN, a resident ot' 3064 Gilbert avenue, Cincinnati. Ohio. have invented a new and useful Improvement in Carriage-Return Mechanism `for 'I`,vpe-\\'riters, which invention is fully set forth in the following specilication.

This invention relates to type-writers, and

more particularly to mechanism for automatically returning the carriage to its initial position.

In many forms otl type-writers provided with the usual platen-carriage which reciprorates from right to let't the carriage is returned by hand from its left-hand to its eX- treme right-hand position by tirst manipulating a lever to disei'igagc the carriage from the rack-bar and then manually shitting the carriage to the desired right-hand position. By means ot` the present invention the typewriter is provided with a lever extending to the keyboard and carrying a suitable key which only has to be touched by the operator and the carriage will automatically return to its position Vfrom any point along` the carriageway. By another part of the invention means are provided whereby the carriage may be returned t'rom lett to right for only a portion ot' the way or to any desired extent-"as, for example, when it is desired to return the carriage through but a few spaces in order to make corrections, oac.

Broadly stated, the invention consistsin providing the type-writing machine having the usual carriage-advancing spring with a return-spring stronger than said advancingspring, which return-spring is wound by a step-b v-step movement through the medium ot' the key-levers du ring` the operation otl writing, the spring being retained in its wound position or under tension by means ot' a suitable retaining-pawl engaging' the ratchet-wheel on the return-spring drum, which retaining-pawl is tripped by the carriage-return lever before mentioned. Additional means are provided for tripping the retaining-pawl, which means are connected by suitable devices with the rack-bar ot` the machine, so that when the rack- 1903. Serial No. 165,169,

bar is elevated by hand for shitting the carriage the act ot elevating the rack-bar trips l the retaining-pawl and leaves the carriage free to be reciprocated without any interference t'rom said pawl. The carriage-rettirn lever, which is depressed in order to trip the retaining-pawl when it is desired to return the carriage to its initial position, is provided wit-ha suitable catch or other retaining device for holding the lever in position to retain the pawl out of engagement with the return-spring ratchet until the carriage has fully returned to its initial position, at which time or just before it reaches this position the carriage automati ally trips the catch, so as to tree the lever and retaining-pawl and permit the carriage-return level' to return to its normal position. As the extreme right-haiul position otl the carriage in most t'ormsot' type-writers is adjustable Ior the purpose ot' varying the left-hand margin, which adjustment is Qenerally secured by what is known as an adjustable marginal stop, it is essential that the retaining-catch for the carriage-return lever should be tripped at the terminal movement ot the carriage at whatever point the marginal stop may be adjusted. For this purpose the trip which actuates the catch to the carriage-rettirn lever is itseltl ailjustable. and preferably is mounted upon and adjustal'ile simultaneously with the marginal stop` The invention also consists in certain minor details ot' construction, which will be hercinat'ter more Vfully described and then pointed outin the claims.

The invention may receive various mechanical cxpressions, one ot' which is illustrated in the accompanying drawings, in which Figure I is a rear elevation with some ot' the parts broken away to render the illustration clearer. Fig. 2 is a lett-hand elevation of Fig. I. Fig. is a diagrammatical perspective view ot'certain ot' the parts. Fig. i is a vertical section through the return-spring and its drum and certain connected parts, and Fig. 5 is a detail in perspective ot' the carriage-return-lever catch and the trip mechanism therefor.

Referring to the drawings, on any suitable entinvention whereby the pawls 8 and 18 shall framework 1 is mounted a bail-piece 2, pivoted in the rear part of the frame, which bailpiece is depressed by the action of the keylevers 3 in striking any given key.

4 is a lever pivoted at 5 to the framework of the machine, which lever has one of its arms connected to the bail-piece 2 by any suitable connecting device, (here shown as a yoke 6 and the swivel-link 7.) The opposite end of the lever 4 carries a pawl 8, engaging a ratchet- Wheel 9 on the shaft 10, having bearings in the framework of the machine. The ratchet-wheel 9 and the pinion 11 are keyed to such shaft, and the pinion engages a gear-wheel 12 upon spring-drum 14, to which drum is connected a pulley 15, ov-er which extendsa suitable cable 16, having one end secured to the periphery of the pulley and the other end secured at 17 to the carriage of the machine. In addition to the actuating-pawl 8 a'retaining-pawl 18 is pivoted in such position as to engage the ratchet-teeth on the ratchet-wheel 9 and retain it while the pawl is in the act of moving for rengagement with the ratchetwheel. The lever 4 has a spring 19 normally operating to hold the end of the lever supporting the pawl 8 depressed.

The operation of the mechanism thus far described will be readily understood. When the lever 3 is depressed from the keyboard, it operates to depress one end of the lever 4 and elevate the opposite end bearing the pawl, which thus turns the ratchet wheel and (through the intermediate clockwork-gearing) winds the spring in the spring-drum 14 and at the same time operates to unwind the cable 16 over the pulley asuflcient distance to permit the carriage to be advanced from the right to the left by the ordinary carriage-advancing spring 20.

Pivoted upon the framework of the machine at 21b is a lever 21, one of Whose arms extends forward to the keyboard and carriage-key 22, while the rear end of the said lever extends under the tails of the pawls 8 and 18, so that when the key 22 is depressed the rear end of the lever is elevated and operates to trip the two pawls 8 and 18 and free the spring in the spring-barrel 14, whereupon it reacts to wind the cable 16 upon the pulley 15 and withdraw the carriage from left to right, this operation being secured by virtue of the fact that the spring in the spring-drum 14 is strong enough to overcome and rewind the ordinary carriageactuating spring 20. It is, however, frequently desirable in the operation of the machine to shift the carriage in either direction Without returning it to its extreme right-hand position, and in the act of doing this the operator elevates the rack-bar 27 of the machine, so as to enable the carriage to be shifted from left to right or right to left, as may be desired. In order that this movement may be accomplished, means are provided in the presbe tripped and freed from engagement with the ratchet-wheel 9 whenever the rack-bar is thus elevated by the operator. For this purpose the bell-crank lever 24 is pivoted to the frame at 25 and has one arm pivotally connected to a slide 26, which extends upward and is provided with a lip 26, Fig. 3, overhanging the top of the rack-bar. The other arm of the bell-crank lever 24 is connected by a rod 28 to a crank-arm 29 on a shaft 30, which shaft also carries a wheel 31. having a projecting pin 32, lying normally under the tails of the pawls 8 and 18. Upon elevating the rack-bar 27 the connecting parts are operated to cause the pin 32 to engage' pawls 8 and 18 and vfree them from the ratchet-wheel 9.

The lever 21 is normally held in its elevated position by a spring' 21a, and to insure that the front end of the lever shall remain depressed and the pawls 8 and 18 disengaged from the ratchet-wheel 9 until the carriage has fully returned to its right-hand position a catch 23 is employed for engaging and retaining the rear end of the lever elevated until the terminal movement of the carriage to the right, when said catch may be automatically tripped through the medium of a triprod 23, Figs. 2 and 5.

Referring to Fig. 5, 33 is a marginal stop, which may be of any desired construction, here shown as a member sliding upon a rail or bar 34, extending along the rear right-hand portion of the machine, said bar carrying a pawl which engages with a rack-bar 35 to hold it in any of its adjusted positions. As the particular construction of this marginal stop is no part of the present invention, it need not be further described.

Pivotally mounted upon the framework of the machine is a horiZontally-extending plate 36, to which the rod 23a is connected at 37, the point of connection being to one side of the medial longitudinal line of the plate 36. The other end of the rod 23a is connected to one arm of the bell-crank lever 23", the other arm of which carries the catch 23, the bellcrank lever being normally pressed by a spring 23, so as to push the catch 23 constantly against the face of the lever 21 when said lever is in its normal position. W'hen the keyboard end of the lever 21 is depressed and the rear end elevated, the spring 23C acts to force the nose of the catch 23 under the lever 21and hold it in its elevated position, in which position it engages the tails of the pawls 8 and 18 and holds them disengaged from the ratchet-Wheel 9. The act of the spring' 23c in forcing the nose of the catch 23 under the lever 21 depresses the arm of the bell-crank lever 23", to which the rod 23 is connected, thereby tilting the plate 36, as shown in Fig. 5. l

Pivotally mounted upon the marginal stop 33 is an L-shaped trip 39, one arm of which bears upon the opposite side of the axis of IOO the plate 3b from the point 3T where the rod Q23 is connected to said plate. The other arm ot' this L-shaped trip 39 projects upward and has a horizontal lip tt), which lies in the path ot' the cam t1, supported upon and moving with the carriage. As the carriage returns 'from left to right the cam t1 passes under the lip la) of the trip 39 and turns said trip upon its pivot, thereby depressing' the horizontal arm of the trip, which is in engagement with the tilting plate 36. This action of the trip causes the pivoted plate 36 to rock on its axis and elevate the side of the plate to which the rod 23 is connected, giving an upward pull upon said rod, and thus acting, through the bell-crank lever i. l), to withdraw the catch 2? from under the carriage-return lever 21, which lever is thereupon at once returned to its normal position byitsspring'l".

lt is to be understood that the marginal stop 2%?) is adjustable along' the entire length ot' the rack-bar 3.3, b v which it is retained in its adjusted position, and that as the marginal stop 2323 is shifted along' its rack-bar it carries with it the trip 39. which is thus adjusted anywhere along'thelength of the rocking' plate 3b', so that the trip 39 will act to rock the plate at any point throughout its length and always inst before the carriage is brought to rest by engagement with the marginal stop It will be observed that the mechanism for winding' up the carriage-return spring is ex ceeding'ly simple in character, that the means for tripping' said spring are controlled either from the keyboard or from the carriage rackbar, and that the winding mechanism is automatically returned to its normally operative condition by the act of the carriage upon its terminal return movement.

For the purpose of adjusting the tension of the carriag'ereturn spring' the spring-shaft Je.) is provided with the ordinary form of escapement 43, or the spring' may be wound by an ordinary key eng'ag'ing' the square end at otl the spring-shaft i2.

lt is to be understood that the invention is not limited to the particular formof machine orearriageshown forillustrative purposes in lhe drawings, as the invention is broadly applicable to any form of reciprocating carriag'e.

What is claimed is*d 1. In a type-writer, the combination of a reciprocating' carriage, means advancing' said carriage during' the operation of the machine, a carriage-return spring, winding mechanism for said spring' operated by the key-levers, a device normally restraining said spring' from action to return the carriage` a l\eyboa1'dlever for tripping' said device and automatic means for holding said lever in engagement with said device during the return of the carringe.

2. In a type-writer, the combination of a reciprocating carriage, and a carriage-advancing' spring', with a carriagea'eturn spring, a winding pawl and ratchet for said spring'. operative connections between said pawl and ratchet and with the key-levers, a retaining'- pawl` a trip'lever for said pawl having' one end located at the keyboard and automatic means for holding' said lever in engagement with said pawl during' the return of the earriage.

3. In a typewriter, a reciproeating'carriage, and its advaneing-spring', a carriage-return spring'operativelyconnected to said carriage` means normally restrainingsaid return-spring' from action, releasing' means for controlling' the advance of the carriag'e, and tripping' mech anism for said rest-raining' means operatively connected to said releasing' means.

4:. The combination of the carriage, the car- 1iage-1'eturnspring, the rack-bar, the restraining-pawl for said spring', and i awl-tripping mechanism operatively connected to the rackbar, whereby when the rack-bar is disengaged from its pinion the pawl is tripped and the return-spring' acts upon the carriage.

5. The combination of the carriage, and carriagereturn spring' connected thereto, with the winding-pawl operated by the key-levers, the retaining-pawl, the rack forming part of the carriag'e-release mechanism, and tripping mechanism for tripping both pawls and operatively connected to the said rack.

G. 1n a type-writer, the combination of a carriage, a return-spring', a retaining-pawl, a keyboard trip-lever therefor, restraining' and release mechanism whereby said trip-lever is held engaged to said pawl during the return movement ot' the carriage and is released at the end of such movement.

T. The combination of the carriage and its return-spring, with the retaining-pawl, the trip-lever therefor, the catch for holding' said lever in tripping' position, and automatic catch-releasing means.

S. The combination ot' the carriage and its return -spring, with the retaining-pawl, the trip-lever therefor, the catch for holding' said lever in tripping' position, and eatch-releasing' means actuated by the carriage.

t). The combination of the carriage and its return-spring', with the retaining-pawl, the keyboard trip-lever therefor, the catch for holding' said lever in tripping position, and adjustable catch-releasing' means.

'10. The combination ofthe carriage and its return-spring, with the retaining-pawl, the triplever therefor, the catch for holding' said lever in tripping position, the marginal stop for the carriage, and catch-releasing' means mounted on said marginal stop.

1l. The combination of the carriage and its return spring, with the retaining-pawl, the trip-lever therefor, the catch for holding'said level' in tripping position, a rocking' member IOC ITO

connected to said catch, and means actuated l by the carriage to rock said member, whereby the catch is tripped.

1Q. rhe combination of the carriage and its l return -spring, with the retaining-pawl, the trip-lever therefor, the catch for holding said lever in tripping position, a rocking member connected to said catch, atilting lever adjustable along said member, and means on the carriage engagngand tiltingsaid lever, whereby the catch is tripped.

13. The combination with the carriage and its return-spring, with restraining` means for said spring, devices for throwing and holding said restraining means out of action, and means actuated by the carriage for freeing said devices, whereby the spring is again placed under restraint.

14:. In a type-writer, the combination of a reciprocating carrlage, a carriagereturn spring, winding mechanism forsaid spring op- DUvALL D. ROBINSON, AGNES SIEREVELD. 

